I'm really pleased with our gas consumption in the 5.0. Get low 20's easy on highway and average almost 18 in suburban stop and go. Pretty impressive for a vehicle as heavy and powerful as this car is. Extremely pleased with the power and gas mileage. If you drive the vehicle and get used to the power, you could care less about the mileage, really. The power delivery and transmission are just amazing. The X5 5.0 is my favorite BMW that I have ever owned. And I've owned a lot...